GBA emulator VisualBoy Advance Quick Start
Help

1. Download the GBA Emulator and unzip
/ install it to any directory you like. (On WinXP you
can open zip files without decompressing them but I strongly
suggest you do extract the emu to a directory because
by default that dir will be used to store gba rom save
game files .sav)

2. Now to play roms games you need to open GBA roms within
the emulator. Most simple way to do this is to Drag-And-Drop
the rom file over the emulator window OR open the emu
- got to File > Open and select the game rom you wish
to play.

Default Keysyou can redefine emulators keys
or assign them to a Joystick under
Options -> Joypad -> Configure)

Casual and hardcore gamers as it is should always consider playing DS rom games on the NDS console using a 3DS R4 / R4i Gold DSi Card. For reviews and firmware kernel downloads of R4 3DS cards please go to R4 Shop as it is the official online store for Nintendo game flash cartridges and backup copiers.
But if you would like to get the DS gaming experience without any cost, why not try a DS emulator like No$GBA or DeSmuME. Nintendo DS Emulators essentially emulates the DS on another platform like PC or Mac OSX. The idea of emulating video games is not new, however with growing processing power, there are now emulators for Nintendo GameBoy and GameBoy Advance and Sony PlayStation and PlayStation 2, iPhone Emulator, Android Emulator. As for Nintendo DS emulators, there are lots of them available on the Internet. An example is the DeSmuME.

Pokemon Ruby rom for gba was the top gba roms according to Google.
Yu Gi Oh and Golden Sun came in at the second place.

Emu
Hardware

Pokemon Emulator 3DS GBA DS
Nintendo DS games can be played using a hardware flash cards or by running software on PC / Android or iOS device. For 3DS pokemon games there i sonly hardware emulation solutions at this time.